Trap



/M//Jm Wir/M Sept. 27, 1932. R. H. CARSON 1,879,791

TRAP

Filed Nov, 2, 1929 COE Patented sept. Y27, 1932y i f nonnnr II. canso-mon carence, ILLINOIS, Ass-IeNon, BY IvrEsNn ASSIGNMENTS, l:no f Innsn conI'oRATIoN, or eHIcAeo, ILLINoIs, a conronATIoNoI ILLINOIS y Appncanqn'mea November, 2,1929. serarNg. 404,424.y

TheV invention has among its particular ob-l jects the production'of a construction which ing fluid and the difference between atmospheric pressure and the pressure of theiiuid.

Another object of the invention is the provision of a construction such kas that just reerred to which includes pressure responsive and thermally operable meansfor controlling the valve and tov associate with said structure a means for limiting opposed directional movements of the pressure lresponope'rable means with each other to provide a flnent thereof relatively to the seat Yoi" the .effect operation of the valve.

The invention has these and other objects, ;all of which will be described and more clearivalve, the structure being capa-ble of further "adjustments to regula-te the pressure and temperature at which' the device willv function to modifications may beresorted to without de'-' parting from the spirit of the appended claims forming a part hereof. i In the drawing, Y

Fig. 1 is a central sectional view of a device constructed according to the invention;

Fig. 2 is a view similar to Fig. 1 showing the elements of the structure'in a changed relation; and

Fig. 3 is a plan view of shown in Figs. 1 and 2. Y

The structure disclosed in thel drawing contemplates a trap comprised of a housing forming a valve chamber l11 whichl is closed at itsV upper end by a cap 12,v the cap being screw-threaded intpl the housing 10.

one `oit the elements The housing 10 is formed to provide passages 13y and 14 whereby the'trap Amay be operatively connecte-d to a radiator l(not shown) and a returnline through the medium `of a riser 15. The passage l13 is adaptedl'to bev connected through la suitable nipple or coupling device 16 with the radiator andthe passage 14 preferably provided V.with internal screw threads whichare adapted to engage the screw-threads 'provided upon the riser providing va connection between the Vdevice andthe return pipe o1c the systeml The housing 10k is provided with a screw-threaded apertureto receive :a bushing 17 Awhich forms j a valve seat for'the'va'lv'e 18, thelatter of sive and thermally operable means to thereby control operation of a valve associated with said elements. f' f f Y A still further object of the'invention f to combine pressure responsive and thermally :3Q-z `unitary structure comprised of elements such -`as these and to provide for-unitary adjustwhich is rigidly secured to one wall of a diaphragm generally designated 19.`VV This diaphragm 19 has another` wall secured to a post 20. The post 20 is in turn rigidly secured to one wall of a diaphragm generally designated 21, another wall ofthe diaphragm 21 being secured to anapertured screw-threaded element 22. This element 22 is screw-threaded intothe bore 23=providedin a boss 24: which ,v projects from the cap 12 into the-interior of thehou'sing 10. The screw-threaded element 22 may be brought into a plurality of adjusted positions vwith respect to the valve seat 17, it being obviousl that said element may be screwed up or down in the bore ofthe-boss 24,

4it* beingunderstood that the screw-threaded Yelement 22 is provided with a slot orl some other construction to receive a suitable tool whereby'this lelement may be rotated with resp'ect to the boss 24:.VA A'nut 25, also screwthreaded in the bore'23'of'the boss, may be brought into a position wherein it abuts the screw-,threaded element V22 to lock the latter againstaccidental displacement. It will be noted that the' nut land the screw-threaded element are each provided with kcentrally disposed apertures f `respectively designated 26 and 27, the Vopenings of which align with each other. A screw-threaded 'post 28 has one end'thereof threaded into the member 20,

the post being adapted to proj ectthrough the apertures provided in the nutj and screw- 'threadedelementf In practice, thediameter Vof these apertures isgreater thanthe diameter of the post 28 which will thus provide a proper amount of clearance between thep'os't returnmain.

inthe diaphragm 21. Tt will'be noted that'l the post 28 has screw-threads pr'ovidecupoii they lower end thereof and thata nut 30 is" screwrthreaded upon the p ost and clamps one;l .wall of the diaphragm 21 against thepost 2 0.

A nut 81 is screw-threaded upon the upper erate with i M and should this displacement i i the the screw-threaded and preferably ,ment in this connected end of the post 28. This last mentionednut is provided and designed tobe brought into adjusted positions upon the post and 'to coop#y movement di notedthat if the diaphragm 21 expands, the

post 28 is displaced ina downward direction l be suiiicient,

nut v31 will engage element 25 and prevent further displacement of the post and the elements connected/there. with. It will also bey noted that the nut 80-4 ,engages the screw threaded element 22 andY limits movement of the elements connected `to direction.k The dia the post in an upward thermostatic element phragm 19constitutes a I .s isresponsive to changes in temperature. In

, other words,

v...when subjected to a the diaphragmy will expand 'i Aof fluid throughthe trap. Whenvrelatively cool liquid and non-condensible gases accumu-J .il from the radiator and the diaphragm is again l. subjected to heated vapor, it

18 to engage the valve seatv` l17. It being one of the prime objects of a will expand and cause the valve trap vof this character to prevent the escape of vapor from'the radiator and permit coni .densate and noncondensible gasestobe discharged fromthe radiator in a system adapt- V 'i ed to be operated with a partial vacuum obf taining in the boiler of the system and with a still larger vacuum obtaining in the return t main, it is readily understood that when a f suiliciently high vacuum obtainsin the radia- V tor and the return main, the temperature of ii D the vapor therein would not be sufficiently high to cause thev diaphragm 19 to function f properly, the temperature to which this diaf yphragm is'then subjected being so low that the valve 18 will not engage the seat thereof to prevent the vapor from escaping into the the nut 25 to limit downward of the post and alsoV limitmove dll'DOIl Of the other. lelG/IIS' the diaphragm 19 willthen function'pr'operly l,"akfnfd will contract to unseatfthe valve`18 when- ,ever condensate noniconden'siblef'gases acci'nnulatel in the vchamber 11 after thisy condensate and all or soineofthe gaseslhave with the. post. Thus, it will be contains somesubstance which .y

rise in temperature and will contract when thetemperature falls. InY

ypractice,.the nut 31 is preferably so adJusted that the diaphragmV 19 will control the flow pl'ace thevalve 18 Ytoward thevalve seat 17 so th'atthe diaphragm 19 needonly expand relatively'small amounts to bring 'the valve into engagement with its seat. The nut 31 is preferably@ adjustedilpon' theinast A28 S0 thatwhena relatively high,YaCUuluQbtanS within the chamber, the diaphragm 21 will not expand to such an extent that the valve vl8 would engage the seat thereof unless the A diaphra'giil19issubjected to vapor of a teme peraturey corresponding to thev'acuums 0btained',fw'vithinthe'chamber 111. bviously,

been `ldisch-arged from thev chambers and the diaphragm 19 is again subj'ectexdjto the vapor, I

it willex'panid and sea'tithe: valve18fflf the `system is designedl softhatfitymay be operated on a maximum vacuum of'gtyventy inches of mercury in the return main, Vthe nut' 31 will e' be positionedfupon the postfso that it'will engage/,theassociated nut 25 *whenevery a vacuum of twenty 4inches obtainsfyvithin chamber 11. Then when the diaphragml'QQis' sub- Y jectedv to4 vapor ofl 'acorresponding temperature, it will ,expand and Seat bhefralre., 18 S0 that vapor will not be ,drawn into ,the` return main. It willbe noted that thev'alve 18 is of a taperedformation yso that the ,reflective cross sectional' area ofthe passageprovided in the' element providing they valve seat 17 is gradually, reduced' as the valve `ismoved toward its seat.

As mentioned above, when partial vacuums obtainin thel valve chamber 11, the diaphragm f21 is expanded and theaccumulation of' liquid andnonconden'sible gases in the chamber l1 and: lin the lower portion of the associated radiators ycauses the diaphragm-19 to unseat the valve l8'so`thatlliquid and no n-condensible gases may be drawn into the return main through the riser-15. Inpractice, I preferably construct the-traps lso'thatjV when liquid continues to accumulater while' vtheV diaphragm V19 isexpan'ded,"the 'valve 18 is displaced a relatively small distance from its seat 17 permitting'the liquidto iiow out substantially continuously, at times and lintermittently at other times, but the liquid flows out soslowly that for all practical purposes, water seals are provided. This prevents a portion of the non-condensible gases from escaping from the radiators, and of course, reduces the amount ofsteam used by thelfradiators per unittme- -AS this feature fairly vilnvnton isimainly iorientirelr apparent when the System is..operating.threushoiltuafsa relative- Aly high vacuum and it is then desirable to have a relatively small exchange of heat between the radiators and the surrounding air, the advantages of my improved construction are readily apparent.

An apertured disc 32 is located Within the diaphragm 19 and is provided to serve as a filler to prevent complete contraction of the diaphragm when subject to a reduced air pressure. This disc 3Q, is in the present showing connected to the valve 18 by means of a post 33 so that said disc is movable with this portion of the thermally controlled means 19.

From the foregoing description of the construction, it is manifest that an arrangement is disclosed which permits the thermally controlled and pressure responsive means to be adjusted as a unit relatively to the valve seat 17 and that the structure is capable of adjustment and'limited movement of the elements in opposite directions.

Having'thus described the invention, what I claim as new and desire to cover by Letters Patent is l. A device ofthe kind described comprising a housing` a valve, pressure responsive means operable by pressure below atmospheric pressure, and means locatedv in theV housing for controlling actuation of the valve, means movable with the pressure responsive means for limiting the expansion of the pressure responsive means to thereby control the temperature required to actuate said valve by said thermally operable means.

2. A device of the kind described comprising a housing, a valve, pressure responsive means and thermally operable means located in the housing for controlling the operation of said valve, said pressure responsive and-ther-A mally operable means being adjustable as a unit relatively to the seat of said valve, and means movable with said pressure responsive and thermally operable means upon adjustment for limiting movement of the pressure responsive means, said limiting means providing means for controlling the temperature required to effect operation of said valve.

3. A device of the kind described comprising a housing, a valve, pressure responsive means operable by pressure below atmospheric pressure and thermally operable means located in the housing for controlling the valve, said casing and pressure responsive means having means which cooperate with each other limitin the .expansion of the pressure responsive means to thereby control the temperature required to actuate said valve by said thermally operable means said element of said pressure responsive means being movable therewith into cooperative relation with said' element of said casing upon expansion of said pressure responsive means.

4. A device of the kin;` described comprising a housing, a valve, pressure responsive thermally operable means and thermally operable means located in the housing for controlling said valve, said pressure responsive, said thermally operable meansand an element of said valve being connected together and being movable as a unit relatively to the seat of the valve, and means respectively provided upon said housing and an element of said pressure responsive means for limiting opposed directional movements of said pressure responsive means. c

'6. A device of the. lrind described comprising a housing having a cap, a valve, pressure responsive means and `thermally operablel means located in the housing and carried by said cap, said pressure responsive and thermally operable means being adjustably mounted in said cap, and means for controlling the thermally operable means to thereby regulate temperature required for actuating said valve. Y

` 7. A device of the kind described comprising a housing, a valve, a diaphragm providing pressure responsive means and a ydiaphragm providing thermally responsive means located in the housing for controlling the operation of said valve, adjacent walls of saiddiaphragms being connected with each other, a support for said diaphragms, said j support being connected with one of the Walls of the pressure responsive diaphragm, and means for limiting expansion of said pressure responsive means, said means including means engageable with said support and extending from another wall of said diaphragm providing said pressure responsive means.

8. A device of the kind described comprising a housing having an opening and a valve seat, a cap removably mounted in said opening, said cap having a threaded opening,

pressure responsive means having a valve as- -sociated therewith, means in said threaded vopening providing means for varying the relative position of. said pressure responsive means and valve relatively to the seat of said valve, thermally responsive means carried by said pressure responsive means, means associated with said pressure and thermally responsive means cooperating with said means Bonn-RT H. cARsoN.

CERTIFICATE 0F CORRECTION.

Patent No. 1,879,791. September 27, 1932.

ROBERT H. CARSON.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page i, before line 1, insert the following paragraph:

The invention relates to valve devices and particularly to thermostatically controlled valve devices such as shown and described by me in my application, filed June 2l, 1928 Serial No. 287,172.;

and that the said. Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Giiice.

Signed and sealed this 22nd day of November, ii. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents. 

